The composition and polar covalent nature of water allow water molecules to form hydrogen bonds with other water molecules.
The thing that makes a thing living is that they are made of cells, use and obtain energy, grow and develop, and living things respond to their enviroment.
Answer:
Viruses with __positive___-sense RNA contain the correct message for translation, while viruses with _negative____-sense RNA must first be converted into a correct message.
Explanation:
Answer:
Explanation:
Staining is done for onion cells to visualize the cytoplasm of yellow and white onions because they are not pigmented. The staining of human cheek cells with methylene blue is necessary to stain the nucleus to get clear image of it under microscope because methylene blue binds to negative charge nucleic acids
While for leaf epidermal cells smears, staining is not necessary as they are visible under light microscope without staining and they also have pigmented materials inside them such as chlorophyll chloroplast. The cork cell is a non-living and have a cell wall whose structure is visible under light microscope.
Answer: To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight.
